Plate Heat exchanger manufacturer, industry solution expert

What are the consequences for the heat exchanger if the rubber gasket of the plate heat exchanger is damaged? _

by:DIGUANG     2021-04-07
What are the consequences for the heat exchanger if the rubber gasket of the plate heat exchanger is damaged?

2019-03-01 13:30
808 plate heat exchanger rubber pad is a circular ring made of a material that can produce plastic deformation and has a certain strength. It is one of the important components of the plate heat exchanger. Today, let’s talk about the three conditions under which the plate heat exchanger rubber gasket will cause damage, and what are the consequences for the plate heat exchanger? Pressure influence-Leakage occurs when the detachable plate heat exchanger is used in the rated working pressure. In addition to the quality factors of the device in the manufacturing and assembly, it is generally related to the abnormal impact load in the system. This is a common operation It is not easy for personnel to check the situation. The instantaneous pressure peak caused by the impact is often about 2 times higher than the normal working pressure, which displaces the rubber gasket installed in the plate heat exchanger and makes the plate heat exchanger seal failure. The heat transfer element of this type of device is made of stainless steel sheet, and its sealing rigidity is relatively poor, and the sealing periphery is very long, so the impact resistance performance is lower than that of the shell-and-tube heat exchanger. Time influence-equipment used or idle for several years, the self-aging of the sealing material may affect the reliability of the seal, so the maintenance opportunity should be used to replace the new gasket in time. Temperature influence-rapid changes in temperature can also lead to seal failure. When there is a rapid change, the linear expansion coefficient and elastic deformation of the rubber gasket and the sealing pre-tightening force will not match, so that the sealing pre-tightening force is reduced, and the pressure bearing capacity of the device is much lower than the rated design pressure. The above three factors are the main reasons for the failure of the rubber gasket of the plate heat exchanger. When a seal failure failure occurs, the cause should be found out as soon as possible to solve the problem, so as to avoid unnecessary losses. The plate heat exchanger will have slight leakage at the beginning, and in the process equipment with a large pressure shock, a large leakage may occur due to the damage of the gasket. Under a strong pressure shock, the gasket can sometimes be removed from the correct installation position of the plate heat exchanger, or even out of the heat exchanger in severe cases. In this case, the equipment must be stopped immediately, and the heat exchanger can be cooled to room temperature without pressure. If the gasket has been deformed under the action of the pressure shock, it can no longer return to its original shape and position, and a new gasket must be replaced. If there is no spare gasket, the plates on both sides of the damaged gasket must be removed from the entire plate heat exchanger group, and then the gasket joint surfaces of the remaining plate heat exchanger plates must be inspected. Remove the damaged rubber pad and assemble it. Then buy a new plate heat exchanger rubber pad, and then add the plates to achieve the original heat exchange capacity. When disassembling and installing the plate heat exchanger, you must pay attention to the A value, that is, the clamping size.
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